I am designing app for ios and android in photoshop. I know I must export graphics to 3@, 2@, 1@ for ios and mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi for android. But I do not know, what size of artwork should I start with? (dimensions, width x height)
I think better will be to start with bigger artboard and the downsample each image to specific output size. But because of so many resolutions and sizes of displays, which size should I pick for ios and which for android?